Fix all remaining lint errors: refactor complex functions in task_handler.py and main.py to reduce complexity

Co-authored-by: notfolder <20558197+notfolder@users.noreply.github.com>

Author: Copilot

handlers/task_getter.py

@@ -7,9 +7,6 @@
     from .task_getter_github import TaskGetterFromGitHub
     from .task_getter_gitlab import TaskGetterFromGitLab
 
-from .task_getter_github import TaskGetterFromGitHub
-from .task_getter_gitlab import TaskGetterFromGitLab
-
 
 class TaskGetter(ABC):
     @abstractmethod
@@ -23,9 +20,12 @@ def factory(
         mcp_clients: dict[str, Any],
         task_source: str,
     ) -> TaskGetterFromGitHub | TaskGetterFromGitLab:
+        # Import here to avoid circular import issues
         if task_source == "github":
+            from .task_getter_github import TaskGetterFromGitHub  # noqa: PLC0415
             return TaskGetterFromGitHub(config, mcp_clients)
         if task_source == "gitlab":
+            from .task_getter_gitlab import TaskGetterFromGitLab  # noqa: PLC0415
             return TaskGetterFromGitLab(config, mcp_clients)
         msg = f"Unknown task_source: {task_source}"
         raise ValueError(msg)